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Finding the Fourth Proportional to 1,173.79, 1,759.65 and 443.87

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Solution

The fourth proportional to 1,173.79, 1,759.65 and 443.87 is: 665.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,173.79 : 1,759.65 = 443.87 : x
  2. Step 2: Convert to fraction form
    1,173.79/1,759.65 = 443.87/x
  3. Step 3: Cross multiply
    1,173.79x = 1,759.65 × 443.87
  4. Step 4: Simplify right side
    1,173.79x = 781,060.24
  5. Step 5: Solve for x
    x = 781,060.24/1,173.79
  6. Step 6: Final answer
    x = 665.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.